<html>

<head>
<meta charset="UTF-8" />
<link rel="stylesheet" type="text/css" href="calculator.css" />
</head>

<body>
    <div class="calculator-plane">
        <input class="output" id="output" type="text" />
        <div class="div-first">
            <input class="input" type="button" value="C" onclick="getValue(this.value)" />
            <input class="input" type="button" value="/" onclick="getValue(this.value)" />
        </div>
        <div>
            <input class="input" type="button" value="7" onclick="getValue(this.value)" />
            <input class="input" type="button" value="8" onclick="getValue(this.value)" />
            <input class="input" type="button" value="9" onclick="getValue(this.value)" />
            <input class="input" type="button" value="*" onclick="getValue(this.value)" />
        </div>
        <div> 
            <input class="input" type="button" value="4" onclick="getValue(this.value)" />
            <input class="input" type="button" value="5" onclick="getValue(this.value)" />
            <input class="input" type="button" value="6" onclick="getValue(this.value)" />
            <input class="input" type="button" value="-" onclick="getValue(this.value)" />
        </div>
        <div>
            <input class="input" type="button" value="1" onclick="getValue(this.value)" />
            <input class="input" type="button" value="2" onclick="getValue(this.value)" />
            <input class="input" type="button" value="3" onclick="getValue(this.value)" />
            <input class="input" type="button" value="+" onclick="getValue(this.value)" />
        </div>
        <div>
            <input class="input" type="button" value="%" onclick="getValue(this.value)" />
            <input class="input" type="button" value="0" onclick="getValue(this.value)" />
            <input class="input" type="button" value="." onclick="getValue(this.value)" />
            <input class="input" type="button" value="=" onclick="getValue(this.value)" />
        </div>
    </div>
    <script src="calculator.js"></script>
</body>

</html>